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MAX1401 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1401 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 36 page +3V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC ________________________________________________________________ Maxim Integrated Products 1 19-1480; Rev 1; 7/02 EVALUATION KIT AVAILABLE General Description The MAX1401 18-bit, low-power, multichannel, serial- output ADC uses a sigma-delta modulator with a digital decimation filter to achieve true 16-bit accuracy. The user-selectable decimation factor of the digital filter allows the conversion resolution to be reduced in exchange for a higher output data rate. The device achieves true 16-bit performance at an output data rate of up to 480sps. In addition, the modulator sampling frequency may be optimized for either lowest power dissipation or highest throughput rate. The MAX1401 operates from +3V. This device offers three fully differential input channels that can be independently programmed with a gain between +1V/V and +128V/V. Furthermore, it can com- pensate an input-referred DC offset (such as system off- set) up to 117% of the selected full-scale range. These three differential channels may also be configured to operate as five pseudo-differential input channels. Two additional, fully differential system-calibration channels are provided for gain and offset error correction. External access is provided to the multiplexer (mux) output to facilitate additional signal processing. The MAX1401 can be configured to sequentially scan all signal inputs and provide the results through the serial interface with minimum communications overhead. When used with a 2.4576MHz or 1.024MHz master clock, the digital decimation filter can be programmed to produce zeros in its frequency response at the line frequency and associated harmonics, ensuring excellent line rejec- tion without the need for further postfiltering. The MAX1401 is available in a 28-pin SSOP package. Applications Portable Industrial Instruments Portable Weigh Scales Loop-Powered Systems Pressure Transducers Features o 18-Bit Resolution, Sigma-Delta ADC o 16-Bit Accuracy with No Missing Codes to 480sps o Access to the Mux Output/ADC Input o Low Quiescent Current 250µA (operating mode) 2µA (power-down mode) o 3 Fully Differential or 5 Pseudo-Differential Signal Input Channels o 2 Additional Fully Differential Calibration Channels/Auxiliary Input Channels o Programmable Gain and Offset o Fully Differential Reference Inputs o Converts Continuously or On Command o Automatic Channel Scanning and Continuous Data Output Mode o Operates with Analog and Digital Supplies from +2.7V to +3.6V o SPI™/QSPI™-Compatible 3-Wire Serial Interface o 28-Pin SSOP Package 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SCLK DIN DOUT INT VDD DGND AIN5 CALOFF+ CALOFF- REFIN+ REFIN- CALGAIN+ CALGAIN- AIN6 AIN4 AIN3 AIN2 AIN1 V+ AGND ADCIN- ADCIN+ MUXOUT- MUXOUT+ RESET CS CLKOUT CLKIN SSOP TOP VIEW MAX1401 SPI and QSPI are trademarks of Motorola, Inc. Pin Configuration Ordering Information 28 SSOP 28 SSOP PIN-PACKAGE TEMP RANGE 0°C to +70°C -40°C to +85°C MAX1401EAI MAX1401CAI PART For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. |
Similar Part No. - MAX1401_02 |
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Similar Description - MAX1401_02 |
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